Problem sending Mail with access

[Persa]

Having problem using the function SendObject on a Windows 2003 server are
only getting error message

"Can't open the mail session "

works fine on aWindows XP computer but not on the Windows 2003 server
the only mail client installed on the server is Outlook Express my XP
computer runs Outlook
is there a problem here or isnt outlook properly registrated

any tips

Example:

DoCmd.SendObject acSendTable, "Test", acFormatXL, (e-mail address removed), , , , ,
True

Thanks for any reply